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do you think a 6 inch in-line duct fan will be enough to cool a 600w bulb?

yeah i'm building my own cooltube atm. thanks for the advice everyone.

when I turn the HPS on it probably gets to around 100 degrees. When I put the thermometer directly under the light, next to the plants, it goes up to 125. That's not very fun. The room is *sealed* but it's up against the roof. Until I build this cool tube I'm running CFLs.

My 600 HPS runs too hot in my grow room so I'm keeping it on hold. However, I'm trying to construct a cool tube by the end of the week. I'm also thinking of shifting the light schedule so it runs at night. Something like 7 or 8 pm to 7 or 8 am. Anyone have experience with this? How much will...

Does anyone know where I could get a hollow glass tube to use for my potential cool tube? I've currently got a 600w HPS on hold until I can come up with something to manage the heat.

yeah most of my plants have been pinched and lst'd. i didn't know if topping on top of that would increase yield.

i've got a tarp and some towels. i change the towels now and then

I started flower on May 5th (Cinco de Mayo!), and I'm wondering if it would be too late to top my plants. Any advice/experience someone could relate?

yeah i think i'm going to use a cool tube

what time would you recommend turning the lights on? the currently turn on at 2pm, doing 16/8. I could do 12/12 from 8 to 8.

Currently, it's simply way too hot to be using the 600w HPS in my room, at least for veg. So I've set up some CFLs in its stead. But when I flower (hopefully soon) I want to get some of that nice budfat:hubba:. I've heard your bud with CFLs is airy, not as dense, which to me equates to less...

it's working so far! lower temps with the weather have helped too. gotta love improv.

alright. the holes aren't that small, though. maybe like an inch in diameter, and there are many of them.

here it is. excuse my crude ms paint skills. i guess in theory, i'd like for cold air to be pumped in, and the hot air and machinery exhaust to get pumped out. but i don't think window units are designed to exhaust like that....we'll see....

no pics today, lemme try and do a paint picture or something.

that one is a window unit =( and so doesn't really work if you're in a windowless room.

I'm currently enduring 100+ degrees F in the grow room. I've looked into portable air conditioners, but they're all a little too pricey. So today I bought a window AC unit for my room. My room is in an attic and there isn't much airflow, let alone windows, but there are openings by the spot...

does anyone know if home depot still sells that portable AC unit for only $80?

Also, dude, if you ultimately plan on doing hydro, I would recommend just going hydro from the start. Your plants are your projects. Projects which take multiple months to get actual production. So if you start soil and realize that maybe you want hydro half way through, there's nothing you can...